libfirm: fix build

srcpkgs/libfirm/template

@@ -19,7 +19,7 @@ esac
 do_configure() {
 	cat <<EOF >config.mak
 variant = release
-CFLAGS_release = $CFLAGS
+CFLAGS_release = $CFLAGS -Wno-error
 LINKFLAGS_release = $LDFLAGS -Wl,-soname=${pkgname}.so.${version%.*}
 V = 1
 CC = $CC
@@ -27,6 +27,7 @@ EOF
 }
 
 do_build() {
+	vsed -i Makefile -e 's;"\\#;"#;'
 	make ${makejobs}
 }